Flexible organic light-emitting diode substrate and manufacturing method thereof

Abstract

A flexible organic light-emitting diode (OLED) display substrate and manufacturing method using the same are provided. The flexible OLED display substrate includes a display region, a non-display region, and a bending region connected to the display region and the non-display region. The bending region is provided with multiple liquid conductive wires spaced from each other. Each liquid conductive wire includes a conductive flow channel disposed in the bending region and a pair of metal wire portions connected to two ends of the conductive flow channel. A packaging layer is arranged on each conductive flow channel to store a liquid conductive material. The liquid conductive material is sealed in each conductive flow channel. Therefore, the liquid conductive wires can greatly improve the production yield of the bending region, and overcome a problem that a conventional bending region is prone to break during a bending process.

What is claimed is: 
     
       1. A flexible organic light-emitting diode (OLED) display substrate, the flexible OLED display substrate comprising a display region, a non-display region, and a bending region connected to the display region and the non-display region, wherein the bending region is provided with a plurality of liquid conductive wires spaced apart from each other, each of the liquid conductive wires comprises a conductive flow channel disposed in the bending region and a pair of metal wire portions connected to two ends of the conductive flow channel, and a packaging layer is disposed on each of the conductive flow channels to store and seal a liquid conductive material, wherein the liquid conductive material is sealed in each of the conductive flow channels, one end of each metal wire portion of each pair of metal wire portions extends into each of the conductive flow channels and comprises two opposite surfaces, the two opposite surfaces are in contact with and are electrically connected to the liquid conductive material, and the other end of each metal wire portion of each pair of metal wire portions is electrically connected to the display region or the non-display region,
 wherein the packaging layer is disposed on an inner surface and a vertical surface of an entire length of the conductive flow channel. 
 
     
     
       2. The flexible OLED display substrate according to  claim 1 , wherein the conductive flow channels are of a linear structure, a double-chain structure, an interlaced triple-chain structure, or an interlaced four-chain structure. 
     
     
       3. The flexible OLED display substrate according to  claim 1 , wherein a cross-section of the conductive flow channels is of a round shape, an oval shape, or a rectangular shape. 
     
     
       4. The flexible OLED display substrate according to  claim 1 , wherein the liquid conductive material consists of mercury or a saturated strong-electrolyte solution. 
     
     
       5. The flexible OLED display substrate according to  claim 1 , wherein the packaging layer is made of an organic polymer material. 
     
     
       6. A manufacturing method of a flexible OLED display substrate, the flexible OLED display substrate comprising a display region, a non-display region, and a bending region connected to the display region and the non-display region, the manufacturing method comprising steps as follows:
 S 10 : forming a plurality of liquid conductive wires spaced apart from each other on the bending region, each of the liquid conductive wires comprising a conductive flow channel disposed in the bending region and a pair of metal wire portions connected to two ends of the conductive flow channel, wherein one end of each metal wire portion of each pair of metal wire portions extends into each of the conductive flow channels and comprises two opposite surfaces, and the other end of each metal wire portion of each pair of metal wire portions is electrically connected to the display region or the non-display region; 
 S 20 : coating a packaging layer in each of the conductive flow channels to store and seal a liquid conductive material, wherein the two opposite surfaces are in contact with and are electrically connected to the liquid conductive material, and the packaging layer is coated on an inner surface and a vertical surface of an entire length of the conductive flow channel; 
 S 30 : disposing a liquid conductive material into each of the conductive flow channels; and 
 S 40 : performing a packaging process on each of the conductive flow channels to seal the liquid conductive material. 
 
     
     
       7. The manufacturing method of the flexible OLED display substrate according to  claim 6 , wherein in step S 10 , each of the conductive flow channels is formed by laser etching. 
     
     
       8. The manufacturing method of the flexible OLED display substrate according to  claim 6 , wherein in step S 30 , the liquid conductive material is disposed into each of the conductive flow channels by inkjet printing or an evaporation technology. 
     
     
       9. The manufacturing method of the flexible OLED display substrate according to  claim 6 , wherein after step S 40 , the manufacturing method of the flexible OLED display substrate further comprises a surface leveling process, a process of coating ultraviolet(UV)-curing adhesive, and a bending process.